And little -- remarkable survival against. All lots the two year old trapped at the bottom of the pool for almost half an hour when paramedics pulled -- out they found no vital signs he was medically dead. Then his parents say. -- miracle happened ABC's Neal Karlinsky has the story. Watching two year old -- -- rescued today it's almost impossible to imagine the horrible seeing his parents faced less than two weeks ago. I got a phone call in. As my daughter Ruth and she said daddy Caleb is back. Caleb was at the bottom of the family pool his breathing and his heart stopped. -- was blue when you know. I had no life -- -- he's not reading his heart was not being. I cannot tell you -- what went through my mind in those and those moments. You're nervous system just shuts down. Amazingly paramedics were able to get him breathing again but doctors warned them their son. Would likely never be this scene again. You're being told that he's gonna have all sorts of issues and he could have disability and and it's just inevitable. Doctors put -- -- to something -- therapeutic hypothermia. Essentially putting his body into a state of hibernation immediately after -- heart was -- started to prevent brain injury. Days later he opened his eyes began to move and to their surprise showed no lingering problems at all. That's amazing he defied the odds he's going to be. 100% normal. Little Caleb rode his bike around the hospital to the amazement of the first responders who saved his life. And his parents say they've since discovered that he is slightly different than he was before. He's actually talking better than he was. The scene recover like this out of the sand and even beyond that. It's just amazing for Good Morning America Neal Karlinsky ABC news.

This transcript has been automatically generated and may not be 100% accurate.

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